in

Move to the incoming adjacent vertices, given the edge labels.

Synopsis

in( [edgeLabel] )
Table 1. Legend
Syntax conventions Description
Lowercase and uppercase Literal keyword. Includes ().
Italics Variable value. Replace with a user-defined value.
[] Optional. Square brackets ( [] ) surround optional command arguments. Do not type the square brackets.
{} Group. Braces ( {} ) identify a group to choose from. Do not type the braces.
| Or. A vertical bar ( | ) separates alternative elements. Type any one of the elements. Do not type the vertical bar.
... Repeatable. An ellipsis ( ... ) indicates that you can repeat the syntax element as often as required.

Description

The in() step moves the traversal to the incoming adjacent vertices, given the edge labels. Specifying no edge label will traverse all incident edges.

Examples

Get all incoming adjacent vertices for all the vertices in the graph:
g.V().in().valueMap()
Get all incoming adjacent vertices for all the vertices with incident edges knows:
g.V().in('knows).valueMap()